PLATE i 
A. —Peas grown in uninoculated soil at the various temperatures of 28°, 26.6°, 24 0 , 
20.6°, 18 0 , 15.2°, 12 0 , and 9 0 C. Twenty seeds were planted in each pot. Plants 
remained free from lesions. 
B. —Peas which survived in steam-sterilized soil inoculated with Corticium vagum 
and held at the various temperatures as designated in A. Considerable damage 
occurred at 28.6° C. 
(450) 
